The Lennox AC and furnace combo cost ranges widely depending on unit sizes, efficiency, and installation complexity. Buyers typically pay $6,500-$18,000 for a complete Lennox central air and furnace replacement; major drivers are SEER, AFUE, and ductwork condition.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Lennox AC + Furnace Combo Installed | $6,500 | $11,000 | $18,000 | Includes mid-efficiency AC ~14-16 SEER and 80-95% AFUE furnace; standard 2,000 sq ft home |
Content Navigation
- Typical Lennox AC and Furnace Combo Price for a 2,000 sq ft Home
- Materials, Labor, Equipment and Permits in the Quote
- How SEER Rating, Furnace AFUE and System Size Change Price
- Practical Ways to Lower Lennox Combo Installation Price
- How Regional Markets Affect Lennox Combo Pricing
- Common Add-Ons, Removal Fees, and Site Complications That Add Cost
- Three Real-World Lennox Combo Quote Examples With Specs
Typical Lennox AC and Furnace Combo Price for a 2,000 sq ft Home
For a 2,000 sq ft U.S. home, expect total pricing by efficiency tier: low $6,500-$8,500, average $10,000-$12,500, high $14,000-$18,000 for top-tier models and complex installs. Average installs use a 3-ton AC (12-16 SEER) and a 90% AFUE gas furnace.
Assumptions: Midwest labor rates, standard single-story access, no major duct repairs.
Materials, Labor, Equipment and Permits in the Quote
| Component | Materials | Labor | Equipment | Permits |
|---|---|---|---|---|
| Outdoor AC Unit | $2,200-$6,000 | $300-$900 | $0-$200 | $0-$150 |
| Furnace | $1,200-$4,500 | $400-$1,200 | $0-$150 | $0-$150 |
| Thermostat & Controls | $75-$400 | $75-$200 | $0 | $0 |
| Duct Modifications | $500-$3,000 | $600-$2,000 | $0-$100 | $0-$100 |
| Disposal & Misc | $0-$200 | $100-$300 | $0-$50 | $0 |
Labor often represents 25%-40% of the installed price depending on scope and local hourly rates.
How SEER Rating, Furnace AFUE and System Size Change Price
Increasing AC efficiency from 13 SEER to 16-20 SEER typically adds $700-$4,000; raising furnace AFUE from 80% to 95% adds $300-$1,500. A 2.5-ton to 4-ton change (common between 1,500-3,000 sq ft homes) shifts material cost by $500-$1,800.
Numeric thresholds: 14 SEER vs 16 SEER; 80% AFUE vs 95% AFUE; 2.5-ton, 3-ton, 4-ton capacities.
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Practical Ways to Lower Lennox Combo Installation Price
Skip premium upgrades, choose a slightly lower SEER or AFUE, and schedule during off-peak season to reduce quotes. Providing clear access, preserving existing compatible ductwork, and getting 3 competitive quotes can cut the installed price by 10%-25%.
Cost control tips: bundle with other home projects, avoid last-minute scheduling, accept manufacturer standard warranty instead of extended add-ons.
How Regional Markets Affect Lennox Combo Pricing
Expect higher prices in the Northeast and West Coast (+8%-20%) and lower prices in parts of the Midwest and South (-5% to -12%). Urban areas with prevailing high labor costs can add $800-$2,500 to the total install price.
Example deltas: Northeast +15%, West Coast +12%, Midwest -7%, Rural -10% relative to national average.
Common Add-Ons, Removal Fees, and Site Complications That Add Cost
Typical extras include AC coil replacements ($400-$1,200), major duct replacement ($3,000-$8,000), ECM blower motors ($400-$900), and refrigerant line sets ($150-$600). Full duct replacement is the largest add-on and can more than double the project cost on older homes.
| Add-On | Low | Average | High |
|---|---|---|---|
| Evaporator Coil | $400 | $900 | $1,200 |
| Full Duct Replacement | $3,000 | $5,500 | $8,000 |
| Line Set Replacement | $150 | $350 | $600 |
| Old Unit Disposal Fee | $75 | $150 | $300 |
Three Real-World Lennox Combo Quote Examples With Specs
| Scenario | Specs | Labor Hours | Total |
|---|---|---|---|
| Basic Replacement | 3-ton AC 14 SEER + 80% AFUE furnace, minimal duct work | 8-12 | $6,500-$8,500 |
| Mid Efficiency Upgrade | 3.5-ton AC 16 SEER + 95% AFUE furnace, new thermostat | 12-18 | $10,500-$13,500 |
| Premium High-Efficiency | 4-ton AC 18-20 SEER + 98% AFUE modulating furnace, new ducts | 18-30 | $15,500-$22,000 |
Example realism: labor hours and totals vary with access, permit needs, and the installer’s crew size.
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Tips for Getting the Best HVAC Prices
- Prioritize Quality Over Cost
The most critical factor in any HVAC project is the quality of the installation. Don’t compromise on contractor expertise just to save money. - Check for Rebates
Always research current rebates and incentives — they can significantly reduce your overall cost. - Compare Multiple Quotes
Request at least three estimates before making your choice. You can click here to get three free quotes from local professionals. These quotes include available rebates and tax credits and automatically exclude unqualified contractors. - Negotiate Smartly
Once you've chosen a contractor, use the proven strategies from our guide — How Homeowners Can Negotiate with HVAC Dealers — to get the best possible final price.